// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "content/renderer/input/input_handler_wrapper.h"

#include "base/command_line.h"
#include "base/location.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "content/renderer/input/input_event_filter.h"
#include "content/renderer/input/input_handler_manager.h"
#include "third_party/WebKit/public/platform/Platform.h"
#include "ui/events/blink/did_overscroll_params.h"

namespace content {

InputHandlerWrapper::InputHandlerWrapper(
    InputHandlerManager* input_handler_manager,
    int routing_id,
    const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner,
    const base::WeakPtr<cc::InputHandler>& input_handler,
    const base::WeakPtr<RenderViewImpl>& render_view_impl,
    bool enable_smooth_scrolling)
    : input_handler_manager_(input_handler_manager)
    , routing_id_(routing_id)
    , input_handler_proxy_(input_handler.get(), this)
    , main_task_runner_(main_task_runner)
    , render_view_impl_(render_view_impl)
{
    DCHECK(input_handler);
    input_handler_proxy_.set_smooth_scroll_enabled(enable_smooth_scrolling);
    input_handler_proxy_.set_touchpad_and_wheel_scroll_latching_enabled(
        base::FeatureList::IsEnabled(features::kTouchpadAndWheelScrollLatching));
}

InputHandlerWrapper::~InputHandlerWrapper()
{
}

void InputHandlerWrapper::NeedsMainFrame()
{
    main_task_runner_->PostTask(
        FROM_HERE,
        base::Bind(&RenderViewImpl::SetNeedsMainFrame, render_view_impl_));
}

void InputHandlerWrapper::TransferActiveWheelFlingAnimation(
    const blink::WebActiveWheelFlingParameters& params)
{
    main_task_runner_->PostTask(
        FROM_HERE, base::Bind(&RenderViewImpl::TransferActiveWheelFlingAnimation, render_view_impl_, params));
}

void InputHandlerWrapper::DispatchNonBlockingEventToMainThread(
    blink::WebScopedInputEvent event,
    const ui::LatencyInfo& latency_info)
{
    input_handler_manager_->DispatchNonBlockingEventToMainThread(
        routing_id_, std::move(event), latency_info);
}

void InputHandlerWrapper::WillShutdown()
{
    input_handler_manager_->RemoveInputHandler(routing_id_);
}

blink::WebGestureCurve* InputHandlerWrapper::CreateFlingAnimationCurve(
    blink::WebGestureDevice deviceSource,
    const blink::WebFloatPoint& velocity,
    const blink::WebSize& cumulative_scroll)
{
    return blink::Platform::current()->createFlingAnimationCurve(
        deviceSource, velocity, cumulative_scroll);
}

void InputHandlerWrapper::DidOverscroll(
    const gfx::Vector2dF& accumulated_overscroll,
    const gfx::Vector2dF& latest_overscroll_delta,
    const gfx::Vector2dF& current_fling_velocity,
    const gfx::PointF& causal_event_viewport_point)
{
    ui::DidOverscrollParams params;
    params.accumulated_overscroll = accumulated_overscroll;
    params.latest_overscroll_delta = latest_overscroll_delta;
    params.current_fling_velocity = current_fling_velocity;
    params.causal_event_viewport_point = causal_event_viewport_point;
    input_handler_manager_->DidOverscroll(routing_id_, params);
}

void InputHandlerWrapper::DidStopFlinging()
{
    input_handler_manager_->DidStopFlinging(routing_id_);
}

void InputHandlerWrapper::DidAnimateForInput()
{
    input_handler_manager_->DidAnimateForInput();
}

} // namespace content
